msm: camera: isp: Fix Page fault dump for first request

In case of page fault for first request, page fault
information is not dumped since we are not initializing
member variable in case of init request.

Change-Id: Iac8238ea47873fb59444a99740ef1e24f891e09c
Signed-off-by: Prakasha Nayak <pnayak@codeaurora.org>